Chair spine



FIG. 1 is a perspective view of our chair spine design;

FIG. 2 is a top view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a back elevational view thereof; and,

FIG. 6 is a bottom view thereof. 

The ornamental design for a chair spine, as shown and described. 